Initial revision

1 files changed, 84 insertions, 0 deletions

diff --git a/libdiskfs/boot-parse.c b/libdiskfs/boot-parse.c
new file mode 100644
index 00000000..342e9486
--- /dev/null
+++ b/libdiskfs/boot-parse.c
@@ -0,0 +1,84 @@
+/*
+   Copyright (C) 1993, 1994 Free Software Foundation
+
+This file is part of the GNU Hurd.
+
+The GNU Hurd is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+The GNU Hurd is distributed in the hope that it will be useful, 
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with the GNU Hurd; see the file COPYING.  If not, write to
+the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
+
+/* Written by Michael I. Bushnell.  */
+
+/* Call this if the bootstrap port is null and you want to support
+   being a bootstrap filesystem.  ARGC and ARGV should be as passed
+   to main.  If the arguments are not in the proper format, an
+   error message will be printed on stderr and exit called.  Otherwise,
+   diskfs_priv_host, diskfs_master_device, and diskfs_bootflags will be
+   set and the Mach kernel name of the bootstrap device will be
+   returned.  */
+char *
+diskfs_parse_bootargs (int argc, char **argv)
+{
+  char *devname;
+  
+  /* The arguments, as passed by the kernel, are as follows:
+     -<flags> hostport deviceport rootname  */
+
+  if (argc != 5 || argv[1][0] != '-')
+    {
+      fprintf (stderr, "Usage: %s: -[qsdnx] hostport deviceport rootname\n",
+	       program_invocation_name);
+      exit (1);
+    }
+  diskfs_host_priv = atoi (argv[2]);
+  diskfs_master_device = atoi (argv[3]);
+  devname = argv[4];
+
+  (void) device_open (master_device_port, D_WRITE, "console", &con);
+  stderr = stdout = mach_open_devstream (con, "w");
+  stdin = mach_open_devstream (con, "r");
+
+  /* For now... */
+  /*      readonly = 1; */
+      
+  /* The possible flags are 
+     q  --  RB_ASKNAME
+     s  --  RB_SINGLE
+     d  --  RB_KDB
+     n  --  RB_INITNAME */
+  /* q tells us to ask about what device to use, n 
+     about what to run as init. */
+	
+  diskfs_bootflags = 0;
+  if (index (argv[1], 'q'))
+    diskfs_bootflags |= RB_ASKNAME;
+  if (index (argv[1], 's'))
+    diskfs_bootflags |= RB_SINGLE;
+  if (index (argv[1], 'd'))
+    diskfs_bootflags |= RB_KDB;
+  if (index (argv[1], 'n'))
+    diskfs_bootflags |= RB_INITNAME;
+  
+  if (diskfs_bootflags & RB_ASKNAME)
+    {
+      char *tmp;
+      printf ("Bootstap filesystem device name [%s]: ", devname);
+      fflush (stdout);
+      scanf ("%a\n", &tmp);
+      if (*tmp)
+	devname = tmp;
+    }
+
+  return devname;
+}
+